Answer:
A)
Concentration of hemoglobin = weight of the hemoglobin / total volume of RBCs
Therefore,
weight of the hemoglobin = concentration of the hemoglobin x Total volume of RBCs
weight of hemoglobin = (8.7x 10⁻¹¹ x 0.34) g
= 2.96 x 10⁻¹¹ g
B)
molar mass of hemoglobin is 64500g/mol.
molar mass (m) = number of moles (n) x M,
∴ n = m/M
so number of moles in 2.96 x 10⁻¹¹ g of hemoglobin with molar mass 64500g/mole
= 2.96 x 10⁻¹¹ / 64500
= 4.5 x 10⁻¹⁶ moles
using Avogadro’s number to calculate the number of molecules from moles.
1 mole = 6.022 x 10²³ molecules
so, 4.5 x 10⁻¹⁶ moles
= 4.5 x 10⁻¹⁶ x 6.022 x 10²³
= 2.71 x 10⁸ molecules
Explanation:
Note: Average volume of a red blood cell = 87 μm³ = 8.7 x 10⁻¹¹ ml
The mean concentration of hemoglobin in red cells = 0.34g/ml.
